Ovality detection device for water-cooling nodular cast iron pipe

Abstract

The utility model belongs to the technical field of pipe fitting ovality detection, and mainly relates to a water-cooling nodular cast iron pipe ovality detection device. The number of the linear driving parts is two, and the two linear driving parts are oppositely assembled on the supporting part; the two elastic telescopic assemblies are assembled at the top ends of the corresponding linear driving pieces correspondingly. The number of the jacking and pressing pieces is two, the two jacking and pressing pieces are assembled at the top ends of the corresponding elastic telescopic assemblies correspondingly, and the two linear driving pieces drive the corresponding jacking and pressing pieces to move so that the two jacking and pressing pieces can elastically jack and press the inner wall of the cast iron pipe; and the range finder is assembled on the supporting piece. The linear driving piece drives the jacking pieces to abut against the inner wall of the cast iron pipe, the cast iron pipe rotates so that the two jacking pieces can elastically abut against different positions of the inner wall of the cast iron pipe, the range finder is used for continuously and repeatedly measuring the distance between the range finder and the two jacking pieces, and due to the fact that the linear driving piece can stretch out and draw back, cast iron pipes with various inner diameters can be measured, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe fitting ovality detection, and mainly relates to an ovality detection device for a water-cooled ductile iron pipe. Background Art

[0002] The traditional process of cast iron pipe is as follows: after the cast iron pipe is cast and formed, it rolls onto the transport vehicle, which drives to the middle of the non-driven track, and then the pipe lifting mechanism puts the cast iron pipe on the non-driven track for about 11 subsequent processing steps. The quality of the pipe is also checked layer by layer. The earlier the quality problem is found and scrapped, the lower the cost will be. Therefore, after the pipe is cast and before it is put on the non-driven track, a quality control process is set up. From the time the cast iron pipe is placed on the transport vehicle to the time the cast iron pipe is transported to the non-driven track, the distance is about 10 meters. The temperature of the cast iron pipe body is about 600 degrees. The traditional detection is manual detection and observation by eyes. In fact, high temperature burns are very harmful to the eyes; at the same time, human participation leads to a large difference in the test results. The cold state detection is manually tested with a ruler, and a long time has passed when the results come out, so timeliness cannot be achieved.

[0003] Based on the above defects, a patent application document with publication number CN110823071A discloses a device for measuring the ovality of a sea pipe, comprising a fixed frame and a set of circular measuring rings arranged on the outer periphery of the sea pipe; the measuring ring is arranged in the fixed frame and connected to the fixed frame with its outer peripheral side surface, and the inner channel of the measuring ring forms a test channel for the sea pipe to pass through. During measurement, the sea pipe is inserted into the measuring ring, and the ovality of the sea pipe is judged based on whether the gap between the outer peripheral surface of the sea pipe and the inner surface (inner peripheral wall surface) of the measuring ring is kept uniform.

[0004] The above-mentioned sea pipe ovality measuring device can also be used to measure the inner diameter of a cast iron pipe. However, since the inner diameter of the measuring ring is fixed, the sea pipe ovality measuring device can only detect the ovality of a cast iron pipe of one diameter, resulting in a relatively small application range of the sea pipe ovality measuring device. Utility Model Content

[0005] The utility model provides a water-cooled ductile iron pipe ovality detection device to solve the problem that the ovality detection device in the prior art has a small application range.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A water-cooled ductile iron pipe ovality detection device, comprising:

[0008] Supports;

[0009] There are two linear drive members, which are relatively assembled on the support member, and both of them extend and retract in the up-down direction;

[0010] There are two elastic telescopic components, which are respectively assembled on the top ends of the corresponding linear driving members;

[0011] There are two pressing pieces, which are respectively assembled on the top ends of the corresponding elastic telescopic components, and two linear driving pieces drive the corresponding pressing pieces to move, so that the two pressing pieces are elastically pressed on the inner wall of the cast iron pipe in a rotating state;

[0012] The distance meter is assembled on the supporting member and is used to measure the distance from the supporting member to the two top pressing members.

[0013] The invention has the following beneficial effects: the linear driving part drives the pressing part to press on the inner wall of the cast iron pipe, and the cast iron pipe rotates so that the two pressing parts are elastically pressed on different positions of the inner wall of the cast iron pipe through the elastic telescopic component, and the rangefinder is used to continuously and repeatedly measure the distance from it to the two pressing parts, and the sum of the two distances is the inner diameter of the cast iron pipe at this location. Since the linear driving part can be telescopic, cast iron pipes of various inner diameters can be measured, and the application range is wide.

[0014] Furthermore, the elastic telescopic component includes a guide rod assembled on the top of the linear driving member, and stoppers are installed at both ends of the guide rod. A spring sleeved on the guide rod is provided between the two stoppers, and the guide rod is also sleeved with the pressing member, one end of the spring presses on a stopper, and the other end of the spring presses on the pressing member to keep the pressing member away from the linear driving member.

[0015] Furthermore, a guide sleeve is fixedly mounted on the pressing member, the guide sleeve is sleeved on the guide rod, and the guide sleeve is engaged with another stop member.

[0016] The invention has the following beneficial effects: the guide sleeve is sleeved on the guide rod, and the guide sleeve is fixed on the top pressing piece, so that the top pressing piece can move more stably.

[0017] Furthermore, a rib plate is provided between the pressing member and the guide sleeve.

[0018] The invention has the following beneficial effects: the rib plate strengthens the connection strength between the top pressing piece and the guide sleeve, thereby making the movement of the top pressing piece more stable.

[0019] Furthermore, the upper side of the pressing piece has a protrusion, and the protrusion presses the inner wall of the cast iron pipe.

[0020] The invention has the following beneficial effects: because the inner wall of the cast iron pipe is arc-shaped, the protrusion can contact the inner wall of the cast iron pipe more fully, thus ensuring the accuracy of the distance meter measurement.

[0021] Furthermore, the support member is equipped with a connecting plate facing the cast iron pipe, and the connecting plate is equipped with the distance meter, which measures the distance from the connecting plate to the two top pressing members respectively.

[0022] Furthermore, the linear driving member is a cylinder, and the cylinder has a telescopic shaft that can be extended and retracted in the up-and-down direction, and the telescopic shaft drives the pressing member to move up and down.

[0023] Furthermore, the support member is a robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the utility model when in use (the manipulator is not shown);

[0027] Figure 3 for Figure 2 The structural diagram without the roller frame;

[0028] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0030] Description of reference numerals:

[0031] 1. Manipulator; 2. Cylinder; 3. Pressing piece; 4. Infrared distance scanner; 5. Spring; 6. Roller frame; 7. Cast iron pipe; 8. Telescopic shaft; 9. Stopper; 10. Guide sleeve; 11. Rib plate; 12. Raised part; 13. Connecting plate; 14. Guide rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] Example 1

[0035] like Figure 1 , Figure 2 As shown, a water-cooled ductile iron pipe ovality detection device includes a roller frame 6, a support member, a linear drive member, a top pressure member 3 and a distance meter.

[0036] Specifically, the roller frame 6 is used to place the cast iron pipe 7 and drive the cast iron pipe 7 to rotate horizontally around its own axis. The roller frame 6 in this embodiment is a prior art and will not be described here. The support member in this embodiment is a manipulator 1, which has an end that can rotate around a horizontal axial direction, and the manipulator 1 can also adjust the horizontal height of the end. The linear drive member in this embodiment is a cylinder 2, which has a telescopic shaft 8 that can be telescoped in the up and down directions. The cylinder 2 has two cylinders, and the two cylinders 2 are relatively assembled on the ends of the manipulator 1. There are two top pressing members 3, and the two top pressing members 3 are respectively assembled on the telescopic shaft 8 of the corresponding cylinder 2, and the two top pressing members 3 are both placed horizontally. The two cylinders 2 drive the corresponding top pressing members 3 to move so that the two top pressing members 3 press on the inner wall of the cast iron pipe 7. The roller frame 6 drives the cast iron pipe 7 to rotate, and at this time, the two top pressing members 3 always press on the inner wall of the cast iron pipe 7. The rangefinder in this embodiment is an infrared distance scanner 4, which can measure the distance from it to the object.

[0037] like Figure 1-Figure 3 , Figure 5 As shown, the infrared distance scanner 4 is mounted on the manipulator 1, and the infrared distance scanner 4 is used to measure the distance from the manipulator 1 to the two pressing pieces 3. As the cast iron pipe 7 rotates, the two pressing pieces 3 will press on different positions of the inner wall of the cast iron pipe 7. Meanwhile, during the rotation of the cast iron pipe 7, the infrared distance scanner 4 will repeatedly measure the distance from the two pressing pieces 3 at a certain time interval, thereby obtaining multiple distance values.

[0038] The cylinder 2 drives the pressing piece 3 to press on the inner wall of the cast iron pipe 7. The infrared distance scanner 4 measures the distances from the two pressing pieces 3 respectively. The sum of the two distances is the inner diameter of the cast iron pipe 7 at this location. At the same time, the roller frame 6 drives the cast iron pipe 7 to rotate, which causes the two pressing pieces 3 to press on different positions of the inner wall of the cast iron pipe 7. During the rotation of the cast iron pipe 7, the infrared distance scanner 4 continuously and repeatedly measures to obtain the sum of multiple distances, from which the maximum sum of the distances and the minimum sum of the distances are selected. According to (D max -Dmin ) / (D max +D min )×100% formula, the ovality is automatically calculated and an alarm is automatically given when it exceeds the specified value, so that the worker on duty will know that the ovality exceeds the standard and the parameters need to be adjusted.

[0039] The telescopic shaft 8 of the cylinder 2 is equipped with an elastic telescopic component that can be telescopic, and the elastic telescopic component is equipped with a pressing piece 3. The elastic telescopic component can be telescopic, and when the pressing piece 3 presses against the inner wall of the cast iron pipe 7, the cylinder 2 may not stop telescoping in time. At this time, the elastic telescopic component plays a buffering role to prevent the pressing piece 3 from being damaged.

[0040] like Figure 3 , Figure 4 As shown, the elastic telescopic component in this embodiment includes a guide rod 14 assembled on the telescopic shaft 8 of the cylinder 2, the guide rod 14 is coaxial with the telescopic shaft 8, and both ends of the guide rod 14 are installed with stoppers 9, and a spring 5 sleeved on the guide rod 14 is provided between the two stoppers 9. The spring 5 is located between the two stoppers 9, which can prevent the spring 5 from sliding out of the guide rod 14. A pressing piece 3 is also sleeved on the guide rod 14, one end of the spring 5 presses on a stopper 9, and the other end of the spring 5 presses on the pressing piece 3 to keep the pressing piece 3 away from the cylinder 2, that is, the pressing piece 3 is installed on the outside of the spring 5.

[0041] like Figure 4 As shown, the top pressing member 3 is fixedly equipped with a guide sleeve 10, which is sleeved on the guide rod 14, and the guide sleeve 10 is engaged with another stopper 9 (the stopper 9 is not in contact with the corresponding spring 5). The guide sleeve 10 is sleeved on the guide rod 14, and the guide sleeve 10 is fixed on the top pressing member 3, so that the sliding contact area between the top pressing member 3 and the guide rod 14 can be larger, so that the top pressing member 3 can move more stably.

[0042] A rib plate 11 is provided between the top pressing piece 3 and the guide sleeve 10. The rib plate 11 strengthens the connection strength between the top pressing piece 3 and the guide sleeve 10, thereby making the movement of the top pressing piece 3 more stable.

[0043] like Figure 5 As shown, a connecting plate 13 facing the cast iron pipe 7 is mounted on the end of the manipulator 1, and the infrared distance scanner 4 is mounted on the connecting plate 13. When measuring the ovality of the cast iron pipe 7, a part of the two top pressing members 3 will extend into the cast iron pipe 7, and the infrared distance scanner 4 measures the distance from the top pressing members 3 to the part extending into the cast iron pipe 7.

[0044] like Figure 4As shown, the upper side of the pressing member 3 in this embodiment has a protrusion 12, and the protrusion 12 presses the inner wall of the cast iron pipe 7. Because the inner wall of the cast iron pipe 7 is arc-shaped, the protrusion 12 can contact the inner wall of the cast iron pipe 7 more fully, so that the accuracy of the rangefinder measurement can be guaranteed.

[0045] The working process of this utility model is as follows:

[0046] The cylinder 2 drives the pressing piece 3 to press on the inner wall of the cast iron pipe 7. The infrared distance scanner 4 measures the distances from the two pressing pieces 3 respectively. The sum of the two distances is the inner diameter of the cast iron pipe 7 at this location. At the same time, the roller frame 6 drives the cast iron pipe 7 to rotate, which causes the two pressing pieces 3 to press on different positions of the inner wall of the cast iron pipe 7. During the rotation of the cast iron pipe 7, the infrared distance scanner 4 continuously and repeatedly measures to obtain the sum of multiple distances, from which the maximum sum of the distances and the minimum sum of the distances are selected. According to (D max -D min ) / (D max +D min )×100% formula, the ovality is automatically calculated and an alarm is automatically given when it exceeds the specified value, so that the worker on duty will know that the ovality exceeds the standard and the parameters need to be adjusted.

[0047] Example 2

[0048] The difference between this embodiment and embodiment 1 is that the support member in this embodiment is a support fixing frame, and the support fixing frame cannot move autonomously.

[0049] Example 3

[0050] The difference between this embodiment and embodiment 1 is that the linear driving component in this embodiment is a hydraulic cylinder or an electric push rod.

Claims

1. A water-cooled ductile iron pipe ovality detection device, characterized in that: include: Supports; There are two linear drive members, which are relatively assembled on the support member, and both of them extend and retract in the up-down direction; There are two elastic telescopic components, which are respectively assembled on the top ends of the corresponding linear driving members; There are two pressing pieces, which are respectively assembled on the top ends of the corresponding elastic telescopic components, and two linear driving pieces drive the corresponding pressing pieces to move, so that the two pressing pieces are elastically pressed on the inner wall of the cast iron pipe in a rotating state; The distance meter is assembled on the supporting member and is used to measure the distance from the supporting member to the two top pressing members.

2. The device for detecting ovality of a water-cooled ductile iron pipe according to claim 1, characterized in that: The elastic telescopic component includes a guide rod assembled on the top of the linear driving member, and stoppers are installed at both ends of the guide rod. A spring sleeved on the guide rod is provided between the two stoppers, and the guide rod is also sleeved with the pressing member, one end of the spring presses on a stopper, and the other end of the spring presses on the pressing member to keep the pressing member away from the linear driving member.

3. The device for detecting ovality of a water-cooled ductile iron pipe according to claim 2, characterized in that: A guide sleeve is fixedly mounted on the top pressing member, the guide sleeve is sleeved on the guide rod, and the guide sleeve is matched with another stopper to stop.

4. The device for detecting ovality of a water-cooled ductile iron pipe according to claim 3, characterized in that: A rib plate is arranged between the pressing piece and the guide sleeve.

5. A water-cooled ductile iron pipe ovality detection device according to any one of claims 1 to 4, characterized in that: The upper side surface of the pressing piece is provided with a convex portion, and the convex portion presses the inner wall of the cast iron pipe.

6. A water-cooled ductile iron pipe ovality detection device according to any one of claims 1 to 4, characterized in that: The support member is provided with a connecting plate facing the cast iron pipe, and the connecting plate is provided with the distance meter, which measures the distance from the connecting plate to the two top pressing members respectively.

7. A water-cooled ductile iron pipe ovality detection device according to any one of claims 1 to 4, characterized in that: The linear driving member is a cylinder, and the cylinder has a telescopic shaft that is telescopic in the up-down direction, and the telescopic shaft drives the pressing member to move up-down.

8. A water-cooled ductile iron pipe ovality detection device according to any one of claims 1 to 4, characterized in that: The supporting member is a robot.

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